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Heu-Jeoung Lim

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#artificial intelligence Preprint Oct 2026

ThinkFuse: Trajectory-Aware Test-Time Fusion for Small Reasoning Models

Small reasoning models (SRMs) have shown strong performance on complex reasoning tasks by generating extended chain-of-thought trajectories, but they often fail to recover once their reasoning enters an erroneous path. Existing test-time fusion methods rely on local fusion signals to determine when to trigger fusion, w...

Myunghoon Kang, Jungseob Lee, Jaehyung Seo et al. · 0 citations
Open access Sep 2026

Large Language Models Create Hallucinations in Response to Negated Text

Large language models (LLMs) have achieved significant advancements in natural language processing tasks, but they remain prone to generating hallucinations—outputs that are logically inconsistent or factually incorrect. While previous research has primarily focused on hallucinations in affirmative contexts, how negate...

Jaehyung Seo, Hyeonseok Moon, Heu-Jeoung Lim · 0 citations
#artificial intelligence Preprint Oct 2026

Distilling Directional Verification

Knowledge distillation aims to transfer the factual knowledge of large language models to smaller models for efficient deployment. Yet a teacher may recall a relation in one direction while failing to generate the answer in the reverse direction. Distillation from its generated answers can therefore propagate this dire...

Jungseob Lee, Sugyeong Eo, Seongtae Hong et al. · 0 citations
#machine learning Preprint Sep 2026

Faster Block-Diffusion Serving with Distribution-Free Risk Guarantees

Redline is a finite-sample procedure that selects operating points, hand-picked or learned, from the correctness of their answers on calibration prompts, and keeps the reference-relative risk, the joint probability that the reference answers correctly and a candidate configuration does not, within a user-chosen budget...

Jungseob Lee, D. Lee, Chanjun Park et al. · 1 citation
Jul 2026

Answer-Conditioned Chains of Thought Degrade Verifiable-Reasoning Distillation in Large Language Models

This work shows that training a strong instruction-tuned reasoning model on its own answer-conditioned chains sharply lowers its verifiable-reasoning accuracy, and generates answer-blind data, because no correctness filter can see this damage in the data.

Jungseob Lee, Seungyoon Lee, Suhyune Son et al. · 0 citations

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